Gage-pin for tympans



I. FRIEDMAN AND D. B. GALT.

GAGE PIN FOR TYMPANS.

APPUCATION FILED NOV. 10. 1919.

Patented Dec. 28, 1920.

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UNITED STATES PATENT OFFICE.

ISRAEL FRIEDMAN, OF WASHINGTON, DISTRICT OF COLUMBIA, AND DWIGHT IB. GALT, 0F RIVERDALE, MARYLAND; SAID GALT ASSIGNOR TO SAID FRIEDMAN.

GAGE-PIN FOR TYMPANS.

Application filed November 10, 1919.

To all whom it may concern:

Be it known that we, ISRAEL FRIEDMAN and DWIGHT B. GALT, citizens of the United States, residing at Washin ton, District of Goliunbia, and Riverdale, lfiaryland, respectively, have invented certain new and useful Improvements in Gage-Pins for Tympans, of which the following is a specification.

The object of this invention is to provide an improved and simplified construction for gage pins for printing presses.

The invention consists in the novel construction, combination and arrangement of parts and elements described and claimed hereinafter and illustrated in the accompanying drawing, wherein:

Figure 1 is a plan of the blank from which the body of the gage is constructed,

Fig. 2 is a plan view of the complete device in position for use,

Fig. 3 is a longitudinal section taken on line 3-3 of Fig. 2,

Fig. 4 is an enlarged transverse section taken on line ir-4 of Fig. 3, and

Fig. 5 is a similar view taken on line 5-5 of Fig. 3.

The entire device, with the exception of the stripper, is formed of a single piece of sheet metal, preferably somewhat resilient, first cut to form a blank (Fig. 1) preferably by stamping.

The blank is of substantially rectangular shape of greater length than width, and is provided near its longitudinal edges with incisions or slits 5, parallel with each other andwith the said edges. These slits extend throughout substantially the entire main portion of the body of the blank but do not extend to the ends of the latter, and communicate with each other near one of the said ends so that the fingers or guide strips 6 formed near the longitudinal edges by the said incisions are connected by the bridge or holder 7. The central metal portion 8 left between the said slits is thus severed entirely at one end from the body and constitutes a tongue or prong to penetrate the tympan of the press to hold the gage body securely in position. The edges of the tongue at its free end may be rounded as shown to provide a sharp point, whereby the application of the gage to the tympan is facilitated. The bridge or holder portion 7 of the body is provided with a slot or opening 9, the latter being preferably of ob- Specification of Letters Patent.

Patented Dec. 28, 1920.

Serial No. 336,777.

long shape and* disposed intermediate the lateral edges of the bridge member with its long sides parallel with the end of the body.

The opposite end of the body is provided with lateral wings 10 which constitute reinforcing side walls when the blank is bent, as will be hereinafter described. The body is also provided near the said end with an opening or slot 11 disposed intermediate the lateral edges of the blank. Anchoring prongs 12 project from the sides of the blank as shown, and, in practice, enter the tympan of the press to assist the tongue 8 in holding the body properly positioned and prevent lateral movement of the said body. The end of the blank is provided with spaced inwardly extending slits or incisions 13, the metal between the said slits being a spring member or leaf for a purpose to be hereinafter mentioned.

The blank thus formed is bent at right angles upon line 15 so that the winged end of the blank extends upwardly. The upwardly extending portion is then bent inwardly on line 16 at right angles in the direction of the tongue and guide fingers so as to form a top 16' to overlie a portion of the body in parallelism therewith. The wing members 10 are then bent'on lines 17 downwardly to form the side walls of the body end, and it will be observed that these walls are of substantially equal depth with the end wall 18 formed between the lines of fold 15 and 16. When bent in the manner mentioned, the opening 11 is disposed in the end wall near the upper edge of the latter. The prongs 12 are bent downwardly at right angles.

The guide strips or fingers are bent backwardly upon themselves substantially upon the lines 19, so that the bridge portion or holder 7 will span the prong 8 inwardly from its end, and it will be observed when so bent the said prong will project beyond the extremities of the fingers. The bent ends of the said fingers, as well as the prong 8, be curved upwardly as shown in Fig. 3, to facilitate application of the gage to the t'ympan.

The stripper for use in connection with the body thus formed is constructed of thin spring metal and is to be inserted in the openings 9 and 11. which, it will be understood, are in longitudinal alinement. The Openings mentioned may be of equal size or may be of varying sizes as shown. In the present instance the opening 9 is of slightly greater breadth than the opening 11, and therefore the stripper, indicated at 20, will be of greater width at one end than at the other. The stripper provides a spring tongue 21 at one end which passes through the opening 11 and closely fits in the same, and shoulders formed at the juncture of the 10 tongue with the body portion of the stripper will limit the movement of the latter in one direction. The wider end of the stripper passes through and closely fits in the slot or opening 9. In the event that both openings 9 and 11 are of equal width," the stripper may be provided at its inner extremity with laterally disposed shoulders 22 to limit the outward movement of the said stripper.

The spring leaf 14: in the top 16 is de- 20 flected downwardly until its end presses firmly upon the stripper, whereby the latter is caused to frictionally engage with the bottom wall of the opening 11. This frictional engagement, as well as the friction caused by the engagement of the spring with the upper surface of the stripper, will firmly hold the stripper against accidental movement, yet will allow of the stripper being readily adjusted by the press operator.

The inner extremity of the bridge member is bent so as to permit of the opening 9 therein receiving the stripper, yet the edges of the said openings frictionally engage with the upper and lower surfaces of the stripper. This frictional engagement holds the stripper end against accidental movement but does not offer sufiicient resistance to prevent the press operator making proper adjustments. Should it be found that the spring at the opposite end of the body is sufiicient to hold the stripper, the bridge member may be so bent that the edges of the opening 9 will not clamp the stripper between them, and the said opening will then act as a guide for the stripper and to prevent the same moving downwardly into contact with the tympan.

In applying the gage it will be understood that the tongue is caused to penetrate the tympan at the desired place. The rear end of the body of the gage is held up off the tympan until the proper location is reached, but when the desired adjustment is obtained, the said end is pressed against the tympan so that the prongs will be caused to pass into the tympan. The gage is thus held firmly against movement, the tongue holding the same against lateral movement, while the prongs prevent torsional as well as longitudinal movement of the body.

By constructing the gage in the manner described, the body provides positive holding means for both ends of the stripper. The leaf spring near the opening in the end wall through which the stripper passes firmly holds the latter at such point, while the clamping action of the bridge near the opposite end of the age body securely holds that end of the stripper. Due to excessive use, should the stripper wear smooth, the clamping action of the bridge and the leaf. spring will hold the same against sliding movement within the body. By thus pro viding double clamping means for the stripper, the jolting and jarring actions of the press cannot cause the stripper to become loose or to move out of proper adjustment. As the opening in the end wall of the body has its lowest edge spaced an appreciable distance above the plane of the bottom of the body, the stripper cannot be made to lie fiat against the tympan to prevent proper operation of the device, and paper or envelops fed to the press will only be arrested and held stationary by the end wall of the gage body. It will be observed, furthermore, that the holding or bridge member supports the rear end of the stripper bar in a plane below that of the opening in the end wall, so that the projecting end of the stripper is caused to extend upwardly.

We claim:

1. A gage pin for tympans comprising a body, a stripper mounted upon said body, and clamping means upon the body to engage the stripper at spaced points.

2. Ina gage pin for tympans, a body having an end wall provided with an opening, a top for said body, a stripper passing below said top and through said opening, and a spring leaf on said top pressing upon said stripper inwardly from said opening.

3. A. gage pin for tympans comprisinga body, the said body having an opening in one end, a bridge integral with and near the opposite end of said body spanning the latter and having a guide space in longitudinal alinement with said opening, and a stripper bar slidable through said opening and in said guide space.

4:. In a gage pin for tympans, a body comprising a base plate providing spaced fingers and a central tongue, a bridge member integral with the free end of said fingers and spanning said fingers and tongue and having an opening therein, a stripper extending through said opening, and the said bridge member being bent so as to cause the edges of its opening to bind upon said stripger.

5. n a gage pin for tympans, a body having spaced fingers and a central tongue,

a bridge member integral with the ends of said fingers and spanning the fingers and tongue, and the said bridge member providing means to receive a stripper bar.

6. In a gage pin for tympans, a body comprising a plate, end, side and top walls on said plate, the said end wall having an opening therein, and a holding member remote from the said end wall and having an opening in alinement with and below the plane of said end wall opening, the said openings adapted to receive a stripper.

In a gage pin for tympans, a body, an end wall on said body having an opening therein, a bridge member remote from the end wall and adapted to support one end of a stripper bar extending through said opening, and the said stripper supporting point of the said bridge member being below the plane of the opening in the said end wall.

8. In a gage pin for tympans, a plate having parallel slits therein to provide spaced fingers and a central tongue, the said fingers projecting beyond said tongue and being connected by a bridge member, the said bridge member and portions of the fingers adapted to be bent backwardly to overlie said fingers, and the said bridge member adapted to support a stripper.

9. A blank for gage pins of substantially rectangular shape, the said blank having spaced parallel longitudinally disposed slits extending throughout the major part of the length of the blank but not to the ends thereof, the said slits communicating with each other near one end of the blank, lateral Wings at the opposite end of the blank, prongs projecting outwardly from the longitudinal edges of the said blank inwardly from said wings, and the end portions of the blank having openings spaced intermediate the longitudinal edges of the blank.

In testimony whereof we alfix our signatures.

ISRAEL FRIEDMAN. DWIGHT B. GALT. 

